Steam boiler



mzww

Aug" Wm A. c. CHURCH STEAM BOILER Filed March 29, 1957 3 Sheets-Sheet l 7'0 IIVSP/RATUR @INVENTOR I ATTORNEYS Aug ww A. c. GHUIRCH STEAM BOILER 195'? 3 Sheets-Sheet 3 Filed March'ZQ ATTORNEYS Patented Aug. 9, 1938 ED ,S TATES NT OFF 1 1C E App i tion Ma c 2 :2 ..Claims.

This invention ,relates to ,Steam boilers a d has for the primaryobject the provision ,of a

device: of-rthe uprighttype which will be economical to construct and operate with various kinds of fuel and has an improved arrangement of tubes each so constructed as to assure maximum efficiency of steam generation.

With these and other objects in view, this invention consists in certain novel features of construction, combination and arrangement of parts to be hereinafter more fully described and claimed For a complete understanding of my invention, reference is to be had to the following description and accompanying drawings, in which Figure 1 is a vertical sectional view illustrating a steam boiler constructed in accordance with my invention.

Figure 2 is a side elevation partly in section illustrating the same.

Figure 3 is a sectional view taken on the line 3-3 of Figure 1. a

Figure 4 is a sectional View taken on the line 4-4 of Figure 1.

Figure 5 is a vertical sectional view illustrating one of the boiler tubes.

Figure 6 is an end view illustrating the same.

Referring in detail to the drawings, the numeral I indicates a boiler, 2 the firebox therefor supported by a base 3 in which is located the usual ashpit 4, access thereto being through a doorway normally closed by a hinged door" 5.

The boiler I is adapted to be partially filled with water and has a water gage 6, drip valve 1, a pressure gage B and a safety valve 9. A water supply pipe is connected with the boiler and is indicated by the character III and a steam outlet pipe is indicated by the character I I. The boiler I includes upper and lower heads I2 and I3, the upper head being substantially domeshaped. The heads are joined together by tie rods I4 and are provided with aligned openings in which is mounted a sleeve I5 acting as a smoke passage. The ends of the sleeve are welded or otherwise secured to theheads I2 and I3. A cylindrical wall I6 is riveted or otherwise secured to marginal flanges formed on the heads I2 and i3 and is provided with a hand opening I! normally closed by a removable cover IS.

The firebox 2 includes a cylindrical wall I9 provided with Vertically arranged flanges detachably secured by bolts or like fasteners 20. The cylindrical wall I9 is secured to the marginal flange of the head I3 and to the base 3. Said base has grate supporting members 2I on which 1937, Serial No. 133,692

grate bars '22 are formed. The grate supporting memb ers 2l are spaced from the cylindrical wall I9 to form therebetweenand. with the base seats for the 'lower ends of water tubes'23. The tubes 23 are grouped in annular formation, as shown in Figure 4, and annular groups of water tubes 24 are connected with the head I3 and depend downwardly in the firebox and are of a shorter length than the water tubes 23 so that the fire within the firebox will be located under the lower ends of the water tubes 24. A door frame for the firebox is indicated by the character 25 and is detachably secured to pairs of the tubes 23, as shown at 26. The door frame is equipped with a fire door 21. The lower ends of the tubes 24 terminate above the fire door. The water tubes 23 and 24 each include a reduced screw threaded upper end threaded in an opening provided in the head I3, as shown at 28. Each water tube 24 and 23 consists of the outer sleeve and an inner tube 29 which extends through the re duced end 28 into the water of the boiler and is of a diameter less than the internal diameter of the outer sleeve and the reduced end 28 thereof. Pins 30 extend through the tubes 29 and engage the reduced ends 28 of the outer sleeve for suspending the tubes 29 within the outer sleeves, they terminating short of the lower end of the outer sleeve, as shown in Figure 5. The tubes 29 admit water to the outer sleeves where said water is heated and generates into steam and passes therefrom back to the boiler to accumulate in the upper portion or steam dome of said boiler.

A booster 32 is arranged centrally of the firebox and smoke passage and is connected with the boiler and consists of a head 33 having a chamber 34 therein and connected with said head 33 and depending therefrom are water tubes 35 similar in construction to the water tubes 23 and 24, except they are shorter in length. A pipe 36 is connected to the head 33 and with the boiler by being threaded in an opening provided in the sleeve I5. A tube 3'8 extends from the chamber 34 to the boiler through the pipe 36 for feeding water from the boiler to the chamber 34 and thence to the water tubes 35. The steam from the water tubes 35 returns to the boiler by way of the pipe 36. mounting of the tubes as shown and described in this boiler it is an easy matter to remove any one of the tubes when damaged and to substitute another therefor and also due to the particular arrangement of the tubes 2. maximum Due to the amount of steam may be generated by this boiler with a minimum consumption of fuel.

What is claimed is:

1. An upright boiler comprising a firebox, a base for said firebox, a combined water and steam chamber mounted on said firebox and having a smoke passage therethrough, tubes connected to said combined water and steam chamber and depending downwardly in the firebox and arranged in groups of annular formation with certain of said groups supported by the base and the other groups terminating short of the base, each of said tubes including an outer sleeve and an inner tube terminating short of the lower end of the outer sleeve and extending into the combined water and steam chamber, a booster arranged in the firebox and connected to the combined water and steam'chamber and including a head having a chamber'with water tubes connected thereto and depending from the head.

2. An upright boiler comprising upper and lower heads, tie rods connecting said heads, an

annular wall secured on said heads and cooperating therewith in forming a combined water and steam chamber, a sleeve extending through said heads and connected thereto to form a smoke passage, a cylindrical wall connected to the lower head, a base supporting the second cylindrical wall and cooperating therewith in forming a firebox with an ash pit thereunder, water tubes connected to the lower head and depending downwardly in the firebox and certain of said tubes supported by the case, each tube including an outer sleeve and an inner tube, means for supporting the inner tube within the outer sleeve with the lower end of the inner tube terminating short of the lower end of the outer sleeve, a pipe connected. to the combined water and steam chamber and extending into the firebox, a head secured to said pipe and having a chamber, a tube extending through the pipe from the chamber of the head to the combined water and steam chamber, and water tubes connected to and depending from said head.

ALBERT C. CHURCH. 

